Aeroplane-wing.



H. W. DU PY. AERQPLANE WING. i APPLIOATIO'AI? FILED MARJB, 1910. n 1,008,630. Patented Nov.14,`1 91 1,

INVENTx..

described, the rigid character of a wing formed of unyielding material, in a degree planes properly so called, but to sails and supporting surfaces of various kinds which are employed in airship building.' I claim herein as my invention:

1. A supporting member for an aeroplane of substantially constant form under all conditions of service, consisting of a rigid frame-work and an enveloping integument, forming a hollow chamber within which said framework is contained, the upper surface of said integument being imperforate and substantially the entire lower surface of said integument being perforate, substantially as described.

2. A supporting member foran aeroplane of substantially constant form under all conditions of service, including in its strucvture upper and nether membranes with an open space between them, the only vcommunication of said open space with the atmosphere being through perforations iii said nether membrane, substantially as described.

A hollow 0r eh'anibered wing ,for an aeroplane formed of a rigid frame-work and upper and lower flexible membranes stretched thereon and inclosing said framework, the lower membrane being perforate, substantially as and for the purposes described.

l In testimony setniy hand.

H. WILFRED'DU PUY. Titn'esses z ALICE' A. TiuLL, FRANCIS J. ToirAssox.

whereof, I lhave hereunto- 

